What is this stuff around water cooling tubes?

[colinstu]

I've seen a lot of WC systems with this piece of plastic twisted around the tube. Example

What does it do? Decoration/ part of the tube / make it stronger...?

 

[Stoney]

some use it for decoration, but its main purpose is to prevent kinks in the tubing.

 

[darkunitzero]

i like how the coils are way too big for the tubing.

 

[gdonnel]

One of my suppliers is now selling wire reinforced flex tubing.

 

[kush]

@ darkunitzero. I guess you're right At first I thought maybe it was an optical illusion or something, but I guess not. How silly, even if that person put it on for only decorative purposes, at least do it right!

And they're sold under the Cool Sleeves name by Swiftech, and Jab-tech has some (in various colors/sizes) by PrimoChill.